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<p>Reports possible <b>NullPointerException</b> during chain methods or properties call.</p>
<p><b>Example:</b></p>
<pre><code>
  domain?.getZone().getName()
</code></pre>
<p>After the quick-fix is applied:</p>
<pre><code>
  domain?.getZone()?.getName()
</code></pre>
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